Abstract: The resting metabolic rate was measured with Kalabakhov-Skortsov respirometer at different temperatures on the Yellow-bellied Tragopan (Tragopan caboti) chickens in development and their adults at different seasons.In a few days after hatching,the body temperature of the Yellow-bellied Tragopan varied with ambient temperature.Their chemical thermoregulation ability was established basically at about 9 days.The relationships between RMR and temperatures in the Yellow-bellied Tragopan adults were linear regression.The slope of regression equations for spring,summer and autumn were insignificantly different.It is supposed that the chemical thermoregulation ability of the Yellow-bellied Tragopan was insignificantly different among the three seasons.The metabolic levels are insignificantly different among seasons too.